BUT HIGHWAY 120 AND A MAJOR HIGHWAY LEADING IN FROM THE BAY AREA IS SHUT DOWN. GOVERNOR JERRY BROWN IS HITTING THE GROUND RUNNING IN MEXICO CITY WHERE HE IS MEETING WITH TOP BUSINESS AND POLITICAL LEADERS. MIKE LUERY IS THERE FOR THIS HISTORIC FOUR-DAY TRADE MISSION. YOU ARE LOOKING AT SOME OF CALIFORNIA'S TOP BUSINESS AND POLITICAL LEADERS. THEY ARE IN MEXICO CITY AS PART OF A TRADE DELEGATION LED BY GOVERNOR JERRY BROWN. GOVERNOR BROWN, WELCOME TO MEXICO. YOU GOT HERE EARLY. LOOKS LIKE YOU HAVE A BUSY SCHEDULE AHEAD OF YOU. IT SHOULD BE BECAUSE CALIFORNIA IS LAYING A VERY SPECIAL ROLE WITH MEXICO, PARTICULARLY ON IMMIGRATION AND TRADE AND HOPEFULLY ON CLIMATE CHANGE. TOMORROW, HE WILL SIGN AN AGREEMENT WITH MEXICAN OFFICIALS DESIGNED TO CUT CARBON EMISSIONS AND REDUCE POLLUTION IN A CITY WHERE AIR QUALITY HAS DRAMATICALLY IMPROVED IN RECENT YEARS. MEXICO CITY IS THE LARGEST METROPOLITAN AREA IN ALL OF NORTH AMERICA. 21 MILLION PEOPLE LIVE HERE. GOVERNOR BROWN IS BANKING ON THE PREMISE THAT SOME OF THEM WILL WANT TO INVEST IN CALIFORNIA. MEXICO IS CALIFORNIA'S NUMBER ONE EXPORT MARKET IN THE WORLD. THERE IS ALSO A VERY STRONG PERSON-TO-PERSON RELATIONSHIP. MEXICO CITY'S MODERN SKYLINE IS IMPRESSIVE, BECOMING AN ECONOMIC POWERHOUSE IN THE WORLD MARKET. AS MEXICO FORGES FORWARD TOWARDS THE FUTURE, IT ALSO EMBRACES ITS PAST. ? THESE DANCERS DRESSED AS AZTEC WARRIORS IN MEXICO CITY ARE A POWERFUL REMINDER OF A STORY TRADITION DATING BACK -- A HISTORIC TRADITION DATING BACK MORE THAN 700 YEARS. IN MEXICO CITY, MIKE LUERY, KCRA 3 NEWS. TOMORROW, GOVERNOR JERRY BROWN WILL HAVE A PRIVATE MEETING WITH THE MEXICAN PRESIDENT. HE IS EXPECTED TO ANNOUNCE A SPECIAL PARTNERSHIP WITH AEROMEXICO. MIKE LUERY WILL BE BEHIND THE SCENES AND SHOW US THE HISTORIC TRADE MISSION. YOU CAN SEE IT ON THE KCRA 3 MORNING NEWS AT 6:00 A.M. LIVE REPORTS ALL DAY TOMORROW MORNING STARTING AT 6:00 AND HE